package avicit.bdp.dds.server.registry;

import avicit.bdp.common.utils.DateUtils;
import avicit.bdp.dds.common.Constants;
import avicit.bdp.dds.common.utils.OSUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.Date;
import java.util.Set;

public class HeartBeatTask extends Thread {

    private final Logger logger = LoggerFactory.getLogger(HeartBeatTask.class);

    private final String startTime;
    private final double reservedMemory;
    private final double maxCpuloadAvg;
    private final Set<String> heartBeatPaths;
    private final ZookeeperRegistryCenter zookeeperRegistryCenter;

    public HeartBeatTask(String startTime,
                         double reservedMemory,
                         double maxCpuloadAvg,
                         Set<String> heartBeatPaths,
                         ZookeeperRegistryCenter zookeeperRegistryCenter) {
        this.startTime = startTime;
        this.reservedMemory = reservedMemory;
        this.maxCpuloadAvg = maxCpuloadAvg;
        this.heartBeatPaths = heartBeatPaths;
        this.zookeeperRegistryCenter = zookeeperRegistryCenter;
    }

    @Override
    public void run() {
        try {
            double availablePhysicalMemorySize = OSUtils.availablePhysicalMemorySize();
            double loadAverage = OSUtils.loadAverage();

            int status = Constants.NORAML_NODE_STATUS;

            if (availablePhysicalMemorySize < reservedMemory
                    || loadAverage > maxCpuloadAvg) {

                logger.warn("load is too high or availablePhysicalMemorySize(G) is too low, " +
                                "it's availablePhysicalMemorySize(G):{},loadAvg:{}",
                        availablePhysicalMemorySize, loadAverage);

                status = Constants.ABNORMAL_NODE_STATUS;
            }

            StringBuilder builder = new StringBuilder(100);
            builder.append(OSUtils.cpuUsage()).append(Constants.COMMA);
            builder.append(OSUtils.memoryUsage()).append(Constants.COMMA);
            builder.append(loadAverage).append(Constants.COMMA);
            builder.append(OSUtils.availablePhysicalMemorySize()).append(Constants.COMMA);
            builder.append(maxCpuloadAvg).append(Constants.COMMA);
            builder.append(reservedMemory).append(Constants.COMMA);
            builder.append(startTime).append(Constants.COMMA);
            builder.append(DateUtils.dateToString(new Date())).append(Constants.COMMA);
            builder.append(status).append(Constants.COMMA);
            //save process id
            builder.append(OSUtils.getProcessID()).append(Constants.COMMA);
            builder.append(OSUtils.diskAvailable());

            for (String heartBeatPath : heartBeatPaths) {
                zookeeperRegistryCenter.getZookeeperCachedOperator().update(heartBeatPath, builder.toString());
            }
        } catch (Throwable ex) {
            logger.error("error write heartbeat info", ex);
        }
    }
}
